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scummvm/scumm/imuse.cpp

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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2003 The ScummVM project
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "stdafx.h"
#include "common/util.h"
#include "common/gameDetector.h" // For kDefaultMasterVolume etc.
#include "scumm/imuse.h"
#include "scumm/imuse_internal.h"
#include "scumm/instrument.h"
#include "scumm/saveload.h"
#include "scumm/scumm.h"
#include "sound/mididrv.h"
////////////////////////////////////////
//
// IMuseInternal implementation
//
////////////////////////////////////////
IMuseInternal::IMuseInternal() :
_old_adlib_instruments(false),
_enable_multi_midi(false),
_midi_adlib(0),
_midi_native(0),
_base_sounds(0),
_paused(false),
_initialized(false),
_tempoFactor(0),
_player_limit(ARRAYSIZE(_players)),
_recycle_players(false),
_queue_end(0),
_queue_pos(0),
_queue_sound(0),
_queue_adding(0),
_queue_marker(0),
_queue_cleared(0),
_master_volume(0),
_music_volume(0),
_trigger_count(0),
_snm_trigger_index(0)
{
memset(_channel_volume,0,sizeof(_channel_volume));
memset(_channel_volume_eff,0,sizeof(_channel_volume_eff));
memset(_volchan_table,0,sizeof(_volchan_table));
memset(_active_notes,0,sizeof(_active_notes));
}
IMuseInternal::~IMuseInternal() {
terminate();
}
byte *IMuseInternal::findStartOfSound(int sound) {
byte *ptr = NULL;
int32 size, pos;
if (_base_sounds)
ptr = _base_sounds[sound];
if (ptr == NULL) {
debug(1, "IMuseInternal::findStartOfSound(): Sound %d doesn't exist!", sound);
return NULL;
}
// Check for old-style headers first, like 'RO'
if (ptr[4] == 'R' && ptr[5] == 'O'&& ptr[6] != 'L')
return ptr + 4;
ptr += 8;
size = READ_BE_UINT32(ptr);
ptr += 4;
// Okay, we're looking for one of those things: either
// an 'MThd' tag(for SMF), or a 'FORM' tag(for XMIDI).
size = 48; // Arbitrary; we should find our tag within the first 48 bytes of the resource
pos = 0;
while (pos < size) {
if (!memcmp(ptr + pos, "MThd", 4) || !memcmp(ptr + pos, "FORM", 4))
return ptr + pos;
++pos; // We could probably iterate more intelligently
}
debug(3, "IMuseInternal::findStartOfSound(): Failed to align on sound %d!", sound);
return 0;
}
bool IMuseInternal::isMT32(int sound) {
byte *ptr = NULL;
uint32 tag;
if (_base_sounds)
ptr = _base_sounds[sound];
if (ptr == NULL)
return false;
tag = *(((uint32 *)ptr) + 1);
switch (tag) {
case MKID('ADL '):
case MKID('ASFX'): // Special AD class for old Adlib sound effects
return false;
case MKID('AMI '):
return true;
case MKID('ROL '):
return true;
case MKID('GMD '):
return false;
case MKID('MAC '):
return true;
case MKID('SPK '):
return false;
}
// Check old style headers, like 'RO'
if (ptr[4] == 'R' && ptr[5] == 'O')
return true;
return false;
}
bool IMuseInternal::isGM(int sound) {
byte *ptr = NULL;
uint32 tag;
if (_base_sounds)
ptr = _base_sounds[sound];
if (ptr == NULL)
return false;
tag = *(((uint32 *)ptr) + 1);
switch (tag) {
case MKID('ADL '):
case MKID('ASFX'): // Special AD class for old Adlib sound effects
return false;
case MKID('AMI '):
return true; // Yeah... for our purposes, this is GM
case MKID('ROL '):
return true; // Yeah... for our purposes, this is GM
case MKID('GMD '):
return true;
case MKID('MIDI'):
return true;
case MKID('MAC '):
return true; // I guess this one too, since it qualifies under isMT32()
case MKID('SPK '):
return false;
}
// Check old style headers, like 'RO'
if (ptr[4] == 'R' && ptr[5] == 'O')
return true;
return false;
}
MidiDriver *IMuseInternal::getBestMidiDriver(int sound) {
MidiDriver *driver = NULL;
if (isGM(sound)) {
if (_midi_native) {
driver = _midi_native;
} else {
// Route it through Adlib anyway.
if (!_midi_adlib) {
_midi_adlib = MidiDriver_ADLIB_create(_mixer);
initMidiDriver(_midi_adlib);
}
driver = _midi_adlib;
}
} else {
if (!_midi_adlib &&(_enable_multi_midi || !_midi_native)) {
_midi_adlib = MidiDriver_ADLIB_create(_mixer);
initMidiDriver(_midi_adlib);
}
driver = _midi_adlib;
}
return driver;
}
bool IMuseInternal::startSound(int sound) {
Player *player;
void *ptr;
// Do not start a sound if it is already set to
// start on an ImTrigger event. This fixes carnival
// music problems where a sound has been set to trigger
// at the right time, but then is started up immediately
// anyway, only to be restarted later when the trigger
// occurs.
int i;
ImTrigger *trigger = _snm_triggers;
for (i = ARRAYSIZE(_snm_triggers); i; --i, ++trigger) {
if (trigger->sound && trigger->id && trigger->command[0] == 8 && trigger->command[1] == sound)
return false;
}
ptr = findStartOfSound(sound);
if (!ptr) {
debug(2, "IMuseInternal::startSound(): Couldn't find sound %d!", sound);
return false;
}
// Check which MIDI driver this track should use.
// If it's NULL, it ain't something we can play.
MidiDriver *driver = getBestMidiDriver(sound);
if (!driver)
return false;
// If the requested sound is already playing, start it over
// from scratch. This was originally a hack to prevent Sam & Max
// iMuse messiness while upgrading the iMuse engine, but it
// is apparently necessary to deal with fade-and-restart
// race conditions that were observed in MI2. Reference
// Bug #590511 and Patch #607175(which was reversed to fix
// an FOA regression: Bug #622606).
player = findActivePlayer(sound);
if (!player)
player = allocate_player(128);
if (!player)
return false;
player->clear();
return player->startSound(sound, driver);
}
Player *IMuseInternal::allocate_player(byte priority) {
Player *player = _players, *best = NULL;
int i;
byte bestpri = 255;
for (i = _player_limit; i != 0; i--, player++) {
if (!player->isActive())
return player;
if (player->getPriority() < bestpri) {
best = player;
bestpri = player->getPriority();
}
}
if (bestpri < priority || _recycle_players)
return best;
debug(1, "Denying player request");
return NULL;
}
void IMuseInternal::init_players() {
Player *player = _players;
int i;
for (i = ARRAYSIZE(_players); i != 0; i--, player++) {
player->_se = this;
player->clear(); // Used to just set _active to false
}
}
void IMuseInternal::init_parts() {
Part *part;
int i;
for (i = 0, part = _parts; i != ARRAYSIZE(_parts); i++, part++) {
part->init();
part->_slot = i;
}
}
int IMuseInternal::stopSound(int sound) {
int r = -1;
Player *player = findActivePlayer(sound);
if (player) {
player->clear();
r = 0;
}
return r;
}
int IMuseInternal::stopAllSounds() {
Player *player = _players;
int i;
for (i = ARRAYSIZE(_players); i != 0; i--, player++) {
if (player->isActive())
player->clear();
}
return 0;
}
void IMuseInternal::on_timer(MidiDriver *midi) {
if (_paused)
return;
if (midi == _midi_native || !_midi_native)
handleDeferredCommands(midi);
sequencer_timers(midi);
}
int IMuseInternal::getMusicTimer() {
int best_time = 0;
Player *player = _players;
int i;
for (i = ARRAYSIZE(_players); i != 0; i--, player++) {
if (player->isActive()) {
int timer = player->getMusicTimer();
if (timer > best_time)
best_time = timer;
}
}
return best_time;
}
void IMuseInternal::sequencer_timers(MidiDriver *midi) {
Player *player = _players;
int i;
for (i = ARRAYSIZE(_players); i != 0; i--, player++) {
if (player->isActive() && player->getMidiDriver() == midi) {
player->onTimer();
}
}
}
void IMuseInternal::handle_marker(uint id, byte data) {
uint16 *p = 0;
uint pos;
if (_queue_adding && _queue_sound == id && data == _queue_marker)
return;
// Fix for bug #733401, revised for bug #761637:
// It would seem that sometimes a marker is in the queue
// but not at the head position. In the case of our bug,
// this seems to be the result of commands in the queue
// for songs that are no longer playing. So we skip
// ahead to the appropriate marker, effectively chomping
// anything in the queue before it. This fixes the FOA
// end credits music, but needs to be tested for inappopriate
// behavior elsewhere.
pos = _queue_end;
while (pos != _queue_pos) {
p = _cmd_queue[pos].array;
if (p[0] == TRIGGER_ID && p[1] == id && p[2] == data)
break;
pos = (pos + 1) &(ARRAYSIZE(_cmd_queue) - 1);
}
if (pos == _queue_pos)
return;
if (pos != _queue_end)
warning("Skipping entries in iMuse command queue to reach marker");
_trigger_count--;
_queue_cleared = false;
do {
pos = (pos + 1) &(ARRAYSIZE(_cmd_queue) - 1);
if (_queue_pos == pos)
break;
p = _cmd_queue[pos].array;
if (*p++ != COMMAND_ID)
break;
_queue_end = pos;
doCommand(p[0], p[1], p[2], p[3], p[4], p[5], p[6], 0);
if (_queue_cleared)
return;
pos = _queue_end;
} while (1);
_queue_end = pos;
}
int IMuseInternal::get_channel_volume(uint a) {
if (a < 8)
return _channel_volume_eff[a];
return (_master_volume * _music_volume / 255) >> 1;
}
Part *IMuseInternal::allocate_part(byte pri, MidiDriver *midi) {
Part *part, *best = NULL;
int i;
for (i = ARRAYSIZE(_parts), part = _parts; i != 0; i--, part++) {
if (!part->_player)
return part;
if (pri >= part->_pri_eff) {
pri = part->_pri_eff;
best = part;
}
}
if (best) {
best->uninit();
reallocateMidiChannels(midi);
} else {
debug(1, "Denying part request");
}
return best;
}
int IMuseInternal::getSoundStatus(int sound, bool ignoreFadeouts) const {
int i;
const Player *player = _players;
for (i = ARRAYSIZE(_players); i != 0; i--, player++) {
if (player->isActive() && (!ignoreFadeouts || !player->isFadingOut())) {
if (sound == -1)
return player->getID();
else if (player->getID() == (uint16)sound)
return 1;
}
}
return (sound == -1) ? 0 : get_queue_sound_status(sound);
}
int IMuseInternal::get_queue_sound_status(int sound) const {
const uint16 *a;
int i, j;
j = _queue_pos;
i = _queue_end;
while (i != j) {
a = _cmd_queue[i].array;
if (a[0] == COMMAND_ID && a[1] == 8 && a[2] == (uint16)sound)
return 2;
i = (i + 1) &(ARRAYSIZE(_cmd_queue) - 1);
}
for (i = 0; i < ARRAYSIZE (_deferredCommands); ++i) {
if (_deferredCommands[i].time_left && _deferredCommands[i].a == 8 &&
_deferredCommands[i].b == sound)
{
return 2;
}
}
return 0;
}
int IMuseInternal::set_volchan(int sound, int volchan) {
int r;
int i;
int num;
Player *player, *best, *sameid;
r = get_volchan_entry(volchan);
if (r == -1)
return -1;
if (r >= 8) {
player = findActivePlayer(sound);
if (player && player->_vol_chan != (uint16)volchan) {
player->_vol_chan = volchan;
player->setVolume(player->getVolume());
return 0;
}
return -1;
} else {
best = NULL;
num = 0;
sameid = NULL;
for (i = ARRAYSIZE(_players), player = _players; i != 0; i--, player++) {
if (player->isActive()) {
if (player->_vol_chan == (uint16)volchan) {
num++;
if (!best || player->getPriority() <= best->getPriority())
best = player;
} else if (player->getID() == (uint16)sound) {
sameid = player;
}
}
}
if (sameid == NULL)
return -1;
if (num >= r)
best->clear();
player->_vol_chan = volchan;
player->setVolume(player->getVolume());
return 0;
}
}
int IMuseInternal::clear_queue() {
_queue_adding = false;
_queue_cleared = true;
_queue_pos = 0;
_queue_end = 0;
_trigger_count = 0;
return 0;
}
int IMuseInternal::enqueue_command(int a, int b, int c, int d, int e, int f, int g) {
uint16 *p;
uint i;
i = _queue_pos;
if (i == _queue_end)
return -1;
if (a == -1) {
_queue_adding = false;
_trigger_count++;
return 0;
}
p = _cmd_queue[_queue_pos].array;
p[0] = COMMAND_ID;
p[1] = a;
p[2] = b;
p[3] = c;
p[4] = d;
p[5] = e;
p[6] = f;
p[7] = g;
i = (i + 1) &(ARRAYSIZE(_cmd_queue) - 1);
if (_queue_end != i) {
_queue_pos = i;
return 0;
} else {
_queue_pos = (i - 1) &(ARRAYSIZE(_cmd_queue) - 1);
return -1;
}
}
int IMuseInternal::query_queue(int param) {
switch (param) {
case 0: // Get trigger count
return _trigger_count;
case 1: // Get trigger type
if (_queue_end == _queue_pos)
return -1;
return _cmd_queue[_queue_end].array[1];
case 2: // Get trigger sound
if (_queue_end == _queue_pos)
return 0xFF;
return _cmd_queue[_queue_end].array[2];
default:
return -1;
}
}
int IMuseInternal::get_music_volume() {
return _music_volume;
}
int IMuseInternal::set_music_volume(uint vol) {
if (vol > 255)
vol = 255;
if (_music_volume == vol)
return 0;
_music_volume = vol;
vol = vol * _master_volume / 255;
for (uint i = 0; i < ARRAYSIZE(_channel_volume); i++) {
_channel_volume_eff[i] = _channel_volume[i] * vol / 255;
}
if (!_paused)
update_volumes();
return 0;
}
int IMuseInternal::setMasterVolume(uint vol) {
if (vol > 255)
vol = 255;
if (_master_volume == vol)
return 0;
_master_volume = vol;
vol = vol * _music_volume / 255;
for (uint i = 0; i < ARRAYSIZE(_channel_volume); i++) {
_channel_volume_eff[i] = _channel_volume[i] * vol / 255;
}
if (!_paused)
update_volumes();
return 0;
}
int IMuseInternal::get_master_volume() {
return _master_volume;
}
int IMuseInternal::terminate() {
stopAllSounds();
if (_midi_adlib) {
_midi_adlib->close();
delete _midi_adlib;
_midi_adlib = 0;
}
if (_midi_native) {
_midi_native->close();
delete _midi_native;
_midi_native = 0;
}
return 0;
}
int IMuseInternal::enqueue_trigger(int sound, int marker) {
uint16 *p;
uint pos;
pos = _queue_pos;
p = _cmd_queue[pos].array;
p[0] = TRIGGER_ID;
p[1] = sound;
p[2] = marker;
pos = (pos + 1) &(ARRAYSIZE(_cmd_queue) - 1);
if (_queue_end == pos) {
_queue_pos = (pos - 1) &(ARRAYSIZE(_cmd_queue) - 1);
return -1;
}
_queue_pos = pos;
_queue_adding = true;
_queue_sound = sound;
_queue_marker = marker;
return 0;
}
int32 IMuseInternal::doCommand(int a, int b, int c, int d, int e, int f, int g, int h) {
int args[8];
args[0] = a;
args[1] = b;
args[2] = c;
args[3] = d;
args[4] = e;
args[5] = f;
args[6] = g;
args[7] = h;
return doCommand (8, args);
}
int32 IMuseInternal::doCommand (int numargs, int a[]) {
int i;
if (numargs < 1) return -1;
byte cmd = a[0] & 0xFF;
byte param = a[0] >> 8;
Player *player = NULL;
if (!_initialized &&(cmd || param))
return -1;
#ifdef IMUSE_DEBUG
{
char string[128];
sprintf (string, "doCommand - %d (%d/%d)", a[0], (int) param, (int) cmd);
for (i = 1; i < numargs; ++i)
sprintf (string + strlen(string), ", %d", a[i]);
debug (0, string);
}
#endif
if (param == 0) {
switch (cmd) {
case 6:
if (a[1] > 127)
return -1;
else
return setMasterVolume((a[1] << 1) |(a[1] ? 0 : 1)); // Convert from 0-127 to 0-255
case 7:
return _master_volume >> 1; // Convert from 0-255 to 0-127
case 8:
return startSound(a[1]) ? 0 : -1;
case 9:
return stopSound(a[1]);
case 10: // FIXME: Sam and Max - Not sure if this is correct
return stopAllSounds();
case 11:
return stopAllSounds();
case 12:
// Sam & Max: Player-scope commands
player = findActivePlayer(a[1]);
if (!player)
return -1;
switch (a[3]) {
case 6:
// Set player volume.
return player->setVolume(a[4]);
default:
warning("IMuseInternal::doCommand(12) unsupported sub-command %d", a[3]);
}
return -1;
case 13:
return getSoundStatus(a[1]);
case 14:
// Sam and Max: Parameter fade
player = this->findActivePlayer(a[1]);
if (player)
return player->addParameterFader(a[3], a[4], a[5]);
return -1;
case 15:
// Sam & Max: Set hook for a "maybe" jump
player = findActivePlayer(a[1]);
if (player) {
player->setHook(0, a[3], 0);
return 0;
}
return -1;
case 16:
return set_volchan(a[1], a[2]);
case 17:
if (g_scumm->_gameId != GID_SAMNMAX) {
return set_channel_volume(a[1], a[2]);
} else {
if (a[4]) {
int b[16];
memset (b, 0, sizeof(b));
for (i = 0; i < numargs; ++i)
b[i] = a[i];
return ImSetTrigger (b[1], b[3], b[4], b[5], b[6], b[7], b[8], b[9], b[10], b[11]);
} else {
return ImClearTrigger(a[1], a[3]);
}
}
case 18:
if (g_scumm->_gameId != GID_SAMNMAX) {
return set_volchan_entry(a[1], a[2]);
} else {
// Sam & Max: ImCheckTrigger.
// According to Mike's notes to Ender,
// this function returns the number of triggers
// associated with a particular player ID and
// trigger ID.
a[0] = 0;
for (i = 0; i < 16; ++i) {
if (_snm_triggers [i].sound == a[1] && _snm_triggers [i].id &&
(a[3] == -1 || _snm_triggers [i].id == a[3]))
{
++a[0];
}
}
return a[0];
}
case 19:
// Sam & Max: ImClearTrigger
// This should clear a trigger that's been set up
// with ImSetTrigger(cmd == 17). Seems to work....
return ImClearTrigger(a[1], a[3]);
case 20:
// Sam & Max: Deferred Command
addDeferredCommand(a[1], a[2], a[3], a[4], a[5], a[6], a[7]);
return 0;
case 2:
case 3:
return 0;
default:
warning("doCommand(%d [%d/%d], %d, %d, %d, %d, %d, %d, %d) unsupported", a[0], param, cmd, a[1], a[2], a[3], a[4], a[5], a[6], a[7]);
}
} else if (param == 1) {
if ((1 << cmd) &(0x783FFF)) {
player = findActivePlayer(a[1]);
if (!player)
return -1;
if ((1 << cmd) &(1 << 11 | 1 << 22)) {
assert(a[2] >= 0 && a[2] <= 15);
player = (Player *) player->getPart(a[2]);
if (!player)
return -1;
}
}
switch (cmd) {
case 0:
if (g_scumm->_gameId == GID_SAMNMAX) {
if (a[3] == 1) // Measure number
return ((player->getBeatIndex() - 1) >> 2) + 1;
else if (a[3] == 2) // Beat number
return player->getBeatIndex();
return -1;
} else {
return player->getParam(a[2], a[3]);
}
case 1:
if (g_scumm->_gameId == GID_SAMNMAX)
player->jump(a[3] - 1, (a[4] - 1) * 4 + a[5], ((a[6] * player->getTicksPerBeat()) >> 2) + a[7]);
else
player->setPriority(a[2]);
return 0;
case 2:
return player->setVolume(a[2]);
case 3:
player->setPan(a[2]);
return 0;
case 4:
return player->setTranspose(a[2], a[3]);
case 5:
player->setDetune(a[2]);
return 0;
case 6:
player->setSpeed(a[2]);
return 0;
case 7:
return player->jump(a[2], a[3], a[4]) ? 0 : -1;
case 8:
return player->scan(a[2], a[3], a[4]);
case 9:
return player->setLoop(a[2], a[3], a[4], a[5], a[6]) ? 0 : -1;
case 10:
player->clearLoop();
return 0;
case 11:
((Part *)player)->set_onoff(a[3] != 0);
return 0;
case 12:
return player->setHook(a[2], a[3], a[4]);
case 13:
return player->addParameterFader (ParameterFader::pfVolume, a[2], a[3]);
case 14:
return enqueue_trigger(a[1], a[2]);
case 15:
return enqueue_command(a[1], a[2], a[3], a[4], a[5], a[6], a[7]);
case 16:
return clear_queue();
case 19:
return player->getParam(a[2], a[3]);
case 20:
return player->setHook(a[2], a[3], a[4]);
case 21:
return -1;
case 22:
((Part *)player)->setVolume(a[3]);
return 0;
case 23:
return query_queue(a[1]);
case 24:
return 0;
default:
warning("doCommand(%d [%d/%d], %d, %d, %d, %d, %d, %d, %d) unsupported", a[0], param, cmd, a[1], a[2], a[3], a[4], a[5], a[6], a[7]);
return -1;
}
}
return -1;
}
int32 IMuseInternal::ImSetTrigger (int sound, int id, int a, int b, int c, int d, int e, int f, int g, int h) {
// Sam & Max: ImSetTrigger.
// Sets a trigger for a particular player and
// marker ID, along with doCommand parameters
// to invoke at the marker. The marker is
// represented by MIDI SysEx block 00 xx(F7)
// where "xx" is the marker ID.
uint16 oldest_trigger = 0;
ImTrigger *oldest_ptr = NULL;
int i;
ImTrigger *trig = _snm_triggers;
for (i = ARRAYSIZE(_snm_triggers); i; --i, ++trig) {
if (!trig->id)
break;
if (trig->id == id && trig->sound == sound)
break;
uint16 diff;
if (trig->expire <= _snm_trigger_index)
diff = _snm_trigger_index - trig->expire;
else
diff = 0x10000 - trig->expire + _snm_trigger_index;
if (!oldest_ptr || oldest_trigger < diff) {
oldest_ptr = trig;
oldest_trigger = diff;
}
}
// If we didn't find a trigger, see if we can expire one.
if (!i) {
if (!oldest_ptr)
return -1;
trig = oldest_ptr;
}
trig->id = id;
trig->sound = sound;
trig->expire = (++_snm_trigger_index & 0xFFFF);
trig->command [0] = a;
trig->command [1] = b;
trig->command [2] = c;
trig->command [3] = d;
trig->command [4] = e;
trig->command [5] = f;
trig->command [6] = g;
trig->command [7] = h;
// If the command is to start a sound, stop that sound if it's already playing.
// This fixes some carnival music problems.
// NOTE: We ONLY do this if the sound that will trigger the command is actually
// playing. Otherwise, there's a problem when exiting and re-entering the
// Bumpusville mansion. Ref Bug #780918.
if (trig->command [0] == 8 && getSoundStatus(trig->command [1]) && getSoundStatus (sound))
stopSound(trig->command [1]);
return 0;
}
int32 IMuseInternal::ImClearTrigger(int sound, int id) {
int count = 0;
int i;
ImTrigger *trig = _snm_triggers;
for (i = ARRAYSIZE(_snm_triggers); i; --i, ++trig) {
if ((sound == -1 || trig->sound == sound) &&
trig->id && (id == -1 || trig->id == id))
{
trig->sound = trig->id = 0;
++count;
}
}
return (count > 0) ? 0 : -1;
}
int32 IMuseInternal::ImFireAllTriggers(int sound) {
if (!sound) return 0;
int count = 0;
int i;
for (i = 0; i < 16; ++i) {
if (_snm_triggers [i].sound == sound)
{
_snm_triggers [i].sound = _snm_triggers [i].id = 0;
doCommand (8, _snm_triggers[i].command);
++count;
}
}
return (count > 0) ? 0 : -1;
}
int IMuseInternal::set_channel_volume(uint chan, uint vol)
{
if (chan >= 8 || vol > 127)
return -1;
_channel_volume[chan] = vol;
_channel_volume_eff[chan] = _master_volume * _music_volume * vol / 255 / 255;
update_volumes();
return 0;
}
void IMuseInternal::update_volumes() {
Player *player;
int i;
for (i = ARRAYSIZE(_players), player = _players; i != 0; i--, player++) {
if (player->isActive())
player->setVolume(player->getVolume());
}
}
int IMuseInternal::set_volchan_entry(uint a, uint b) {
if (a >= 8)
return -1;
_volchan_table[a] = b;
return 0;
}
int HookDatas::query_param(int param, byte chan) {
switch (param) {
case 18:
return _jump[0];
case 19:
return _transpose;
case 20:
return _part_onoff[chan];
case 21:
return _part_volume[chan];
case 22:
return _part_program[chan];
case 23:
return _part_transpose[chan];
default:
return -1;
}
}
int HookDatas::set(byte cls, byte value, byte chan) {
switch (cls) {
case 0:
if (value != _jump[0]) {
_jump[1] = _jump[0];
_jump[0] = value;
}
break;
case 1:
_transpose = value;
break;
case 2:
if (chan < 16)
_part_onoff[chan] = value;
else if (chan == 16)
memset(_part_onoff, value, 16);
break;
case 3:
if (chan < 16)
_part_volume[chan] = value;
else if (chan == 16)
memset(_part_volume, value, 16);
break;
case 4:
if (chan < 16)
_part_program[chan] = value;
else if (chan == 16)
memset(_part_program, value, 16);
break;
case 5:
if (chan < 16)
_part_transpose[chan] = value;
else if (chan == 16)
memset(_part_transpose, value, 16);
break;
default:
return -1;
}
return 0;
}
Player *IMuseInternal::findActivePlayer(int id) {
int i;
Player *player = _players;
for (i = ARRAYSIZE(_players); i != 0; i--, player++) {
if (player->isActive() && player->getID() == (uint16)id)
return player;
}
return NULL;
}
int IMuseInternal::get_volchan_entry(uint a) {
if (a < 8)
return _volchan_table[a];
return -1;
}
uint32 IMuseInternal::property(int prop, uint32 value) {
switch (prop) {
case IMuse::PROP_TEMPO_BASE:
// This is a specified as a percentage of normal
// music speed. The number must be an integer
// ranging from 50 to 200(for 50% to 200% normal speed).
if (value >= 50 && value <= 200)
_tempoFactor = value;
break;
case IMuse::PROP_NATIVE_MT32:
Instrument::nativeMT32(value > 0);
break;
case IMuse::PROP_MULTI_MIDI:
_enable_multi_midi = (value > 0);
if (!_enable_multi_midi && _midi_native && _midi_adlib) {
MidiDriver *driver = _midi_adlib;
_midi_adlib = NULL;
int i;
for (i = 0; i < ARRAYSIZE(_players); ++i) {
if (_players[i].isActive() && _players[i].getMidiDriver() == driver)
_players[i].clear();
}
driver->close();
// FIXME: shouldn't we delete 'driver' here, too ?
}
break;
case IMuse::PROP_OLD_ADLIB_INSTRUMENTS:
_old_adlib_instruments = (value > 0);
break;
case IMuse::PROP_LIMIT_PLAYERS:
if (value > 0 && value <= ARRAYSIZE(_players))
_player_limit = (int) value;
break;
case IMuse::PROP_RECYCLE_PLAYERS:
if (value > 0 && value <= ARRAYSIZE(_players))
_recycle_players = (value != 0);
break;
}
return 0;
}
void IMuseInternal::setBase(byte **base) {
_base_sounds = base;
}
IMuseInternal *IMuseInternal::create(OSystem *syst, SoundMixer *mixer, MidiDriver *native_midi) {
IMuseInternal *i = new IMuseInternal;
i->initialize(syst, mixer, native_midi);
return i;
}
int IMuseInternal::initialize(OSystem *syst, SoundMixer *mixer, MidiDriver *native_midi) {
int i;
_mixer = mixer;
_midi_native = native_midi;
_midi_adlib = NULL;
if (native_midi)
initMidiDriver(_midi_native);
if (!_tempoFactor) _tempoFactor = 100;
_master_volume = 255;
if (_music_volume < 1)
_music_volume = kDefaultMusicVolume;
for (i = 0; i != 8; i++)
_channel_volume[i] = _channel_volume_eff[i] = _volchan_table[i] = 127;
init_players();
init_queue();
init_parts();
_initialized = true;
return 0;
}
void IMuseInternal::initMidiDriver(MidiDriver *midi) {
// Open MIDI driver
midi->property(MidiDriver::PROP_OLD_ADLIB, _old_adlib_instruments ? 1 : 0);
int result = midi->open();
if (result)
error("IMuse initialization - %s", MidiDriver::getErrorName(result));
// In case we have an MT-32 attached.
initMT32(midi);
// Connect to the driver's timer
midi->setTimerCallback(midi, &IMuseInternal::midiTimerCallback);
}
void IMuseInternal::initMT32(MidiDriver *midi) {
byte buffer[32] = "\x41\x10\x16\x12\x00\x00\x00 ";
char info[256] = "ScummVM ";
int len;
// Compute version string(truncated to 20 chars max.)
strcat(info, gScummVMVersion);
len = strlen(info);
if (len > 20)
len = 20;
// Reset the MT-32
memcpy(&buffer[4], "\x7f\x00\x00\x01\x00", 5);
midi->sysEx(buffer, 9);
// Display a welcome message on MT-32 displays.
memcpy(&buffer[4], "\x20\x00\x00", 3);
memcpy(&buffer[7], " ", 20);
memcpy(buffer + 7 +(20 - len) / 2, info, len);
byte checksum = 0;
for (int i = 4; i < 27; ++i)
checksum -= buffer[i];
buffer[27] = checksum;
midi->sysEx(buffer, 28);
}
void IMuseInternal::init_queue() {
_queue_adding = false;
_queue_pos = 0;
_queue_end = 0;
_trigger_count = 0;
}
void IMuseInternal::pause(bool paused) {
int vol = _music_volume;
if (paused)
_music_volume = 0;
update_volumes();
_music_volume = vol;
_paused = paused;
}
void IMuseInternal::handleDeferredCommands(MidiDriver *midi) {
uint32 advance = midi->getBaseTempo();
DeferredCommand *ptr = &_deferredCommands[0];
int i;
for (i = ARRAYSIZE(_deferredCommands); i; --i, ++ptr) {
if (!ptr->time_left)
continue;
if (ptr->time_left <= advance) {
doCommand(ptr->a, ptr->b, ptr->c, ptr->d, ptr->e, ptr->f, 0, 0);
ptr->time_left = advance;
}
ptr->time_left -= advance;
}
}
// "time" is interpreted as hundredths of a second.
// FIXME: Is that correct?
// We convert it to microseconds before prceeding
void IMuseInternal::addDeferredCommand(int time, int a, int b, int c, int d, int e, int f) {
DeferredCommand *ptr = &_deferredCommands[0];
int i;
for (i = ARRAYSIZE(_deferredCommands); i; --i, ++ptr) {
if (!ptr->time_left)
break;
}
if (i) {
ptr->time_left = time * 10000;
ptr->a = a;
ptr->b = b;
ptr->c = c;
ptr->d = d;
ptr->e = e;
ptr->f = f;
}
}
////////////////////////////////////////////////////////////
//
// IMuseInternal load/save implementation
//
////////////////////////////////////////////////////////////
enum {
TYPE_PART = 1,
TYPE_PLAYER = 2
};
int IMuseInternal::saveReference(void *me_ref, byte type, void *ref) {
IMuseInternal *me = (IMuseInternal *)me_ref;
switch (type) {
case TYPE_PART:
return (Part *)ref - me->_parts;
case TYPE_PLAYER:
return (Player *)ref - me->_players;
default:
error("saveReference: invalid type");
}
}
void *IMuseInternal::loadReference(void *me_ref, byte type, int ref) {
IMuseInternal *me = (IMuseInternal *)me_ref;
switch (type) {
case TYPE_PART:
return &me->_parts[ref];
case TYPE_PLAYER:
return &me->_players[ref];
default:
error("loadReference: invalid type");
}
}
int IMuseInternal::save_or_load(Serializer *ser, Scumm *scumm) {
const SaveLoadEntry mainEntries[] = {
MKLINE(IMuseInternal, _queue_end, sleUint8, VER(8)),
MKLINE(IMuseInternal, _queue_pos, sleUint8, VER(8)),
MKLINE(IMuseInternal, _queue_sound, sleUint16, VER(8)),
MKLINE(IMuseInternal, _queue_adding, sleByte, VER(8)),
MKLINE(IMuseInternal, _queue_marker, sleByte, VER(8)),
MKLINE(IMuseInternal, _queue_cleared, sleByte, VER(8)),
MKLINE(IMuseInternal, _master_volume, sleByte, VER(8)),
MKLINE(IMuseInternal, _trigger_count, sleUint16, VER(8)),
MKARRAY(IMuseInternal, _channel_volume[0], sleUint16, 8, VER(8)),
MKARRAY(IMuseInternal, _volchan_table[0], sleUint16, 8, VER(8)),
// TODO: Add _cmd_queue in here
MKEND()
};
// VolumeFader is obsolete.
const SaveLoadEntry volumeFaderEntries[] = {
MK_OBSOLETE_REF(VolumeFader, player, TYPE_PLAYER, VER(8), VER(16)),
MK_OBSOLETE(VolumeFader, active, sleUint8, VER(8), VER(16)),
MK_OBSOLETE(VolumeFader, curvol, sleUint8, VER(8), VER(16)),
MK_OBSOLETE(VolumeFader, speed_lo_max, sleUint16, VER(8), VER(16)),
MK_OBSOLETE(VolumeFader, num_steps, sleUint16, VER(8), VER(16)),
MK_OBSOLETE(VolumeFader, speed_hi, sleInt8, VER(8), VER(16)),
MK_OBSOLETE(VolumeFader, direction, sleInt8, VER(8), VER(16)),
MK_OBSOLETE(VolumeFader, speed_lo, sleInt8, VER(8), VER(16)),
MK_OBSOLETE(VolumeFader, speed_lo_counter, sleUint16, VER(8), VER(16)),
MKEND()
};
const SaveLoadEntry partEntries[] = {
MKREF(Part, _next, TYPE_PART, VER(8)),
MKREF(Part, _prev, TYPE_PART, VER(8)),
MKREF(Part, _player, TYPE_PLAYER, VER(8)),
MKLINE(Part, _pitchbend, sleInt16, VER(8)),
MKLINE(Part, _pitchbend_factor, sleUint8, VER(8)),
MKLINE(Part, _transpose, sleInt8, VER(8)),
MKLINE(Part, _vol, sleUint8, VER(8)),
MKLINE(Part, _detune, sleInt8, VER(8)),
MKLINE(Part, _pan, sleInt8, VER(8)),
MKLINE(Part, _on, sleUint8, VER(8)),
MKLINE(Part, _modwheel, sleUint8, VER(8)),
MKLINE(Part, _pedal, sleUint8, VER(8)),
MK_OBSOLETE(Part, _program, sleUint8, VER(8), VER(16)),
MKLINE(Part, _pri, sleUint8, VER(8)),
MKLINE(Part, _chan, sleUint8, VER(8)),
MKLINE(Part, _effect_level, sleUint8, VER(8)),
MKLINE(Part, _chorus, sleUint8, VER(8)),
MKLINE(Part, _percussion, sleUint8, VER(8)),
MKLINE(Part, _bank, sleUint8, VER(8)),
MKEND()
};
int i;
ser->_ref_me = this;
ser->_save_ref = saveReference;
ser->_load_ref = loadReference;
ser->saveLoadEntries(this, mainEntries);
for (i = 0; i < ARRAYSIZE(_players); ++i)
_players[i].save_or_load(ser);
ser->saveLoadArrayOf(_parts, ARRAYSIZE(_parts), sizeof(_parts[0]), partEntries);
{ // Load/save the instrument definitions, which were revamped with V11.
Part *part = &_parts[0];
if (ser->getVersion() >= VER(11)) {
for (i = ARRAYSIZE(_parts); i; --i, ++part) {
part->_instrument.saveOrLoad(ser);
}
} else {
for (i = ARRAYSIZE(_parts); i; --i, ++part)
part->_instrument.clear();
}
}
// VolumeFader has been replaced with the more generic ParameterFader.
for (i = 0; i < 8; ++i)
ser->saveLoadEntries(0, volumeFaderEntries);
if (!ser->isSaving()) {
// Load all sounds that we need
fix_players_after_load(scumm);
fix_parts_after_load();
setMasterVolume(_master_volume);
if (_midi_native)
reallocateMidiChannels(_midi_native);
if (_midi_adlib)
reallocateMidiChannels(_midi_adlib);
}
return 0;
}
#undef MKLINE
#undef MKEND
void IMuseInternal::fix_parts_after_load() {
Part *part;
int i;
for (i = ARRAYSIZE(_parts), part = _parts; i != 0; i--, part++) {
if (part->_player)
part->fix_after_load();
}
}
// Only call this routine from the main thread,
// since it uses getResourceAddress
void IMuseInternal::fix_players_after_load(Scumm *scumm) {
Player *player = _players;
int i;
for (i = ARRAYSIZE(_players); i != 0; i--, player++) {
if (player->isActive()) {
scumm->getResourceAddress(rtSound, player->getID());
player->fixAfterLoad();
}
}
}
void Part::set_detune(int8 detune) {
_detune_eff = clamp((_detune = detune) + _player->getDetune(), -128, 127);
if (_mc) {
_mc->pitchBend(clamp(_pitchbend +
(_detune_eff * 64 / 12) +
(_transpose_eff * 8192 / 12), -8192, 8191));
}
}
void Part::set_pitchbend(int value) {
_pitchbend = value;
if (_mc) {
_mc->pitchBend(clamp(_pitchbend +
(_detune_eff * 64 / 12) +
(_transpose_eff * 8192 / 12), -8192, 8191));
}
}
void Part::setVolume(uint8 vol) {
_vol_eff = ((_vol = vol) + 1) * _player->getEffectiveVolume() >> 7;
if (_mc)
_mc->volume(_vol_eff);
}
void Part::set_pri(int8 pri) {
_pri_eff = clamp((_pri = pri) + _player->getPriority(), 0, 255);
if (_mc)
_mc->priority(_pri_eff);
}
void Part::set_pan(int8 pan) {
_pan_eff = clamp((_pan = pan) + _player->getPan(), -64, 63);
if (_mc)
_mc->panPosition(_pan_eff + 0x40);
}
void Part::set_transpose(int8 transpose) {
_transpose_eff = transpose_clamp((_transpose = transpose) + _player->getTranspose(), -24, 24);
if (_mc) {
_mc->pitchBend(clamp(_pitchbend +
(_detune_eff * /*64*/82 / _pitchbend_factor) +
(_transpose_eff * 8192 / _pitchbend_factor), -8192, 8191));
}
}
void Part::set_pedal(bool value) {
_pedal = value;
if (_mc)
_mc->sustain(_pedal);
}
void Part::set_modwheel(uint value) {
_modwheel = value;
if (_mc)
_mc->modulationWheel(_modwheel);
}
void Part::set_chorus(uint chorus) {
_chorus = chorus;
if (_mc)
_mc->chorusLevel(_effect_level);
}
void Part::set_effect_level(uint level)
{
_effect_level = level;
if (_mc)
_mc->effectLevel(_effect_level);
}
void Part::fix_after_load() {
set_transpose(_transpose);
setVolume(_vol);
set_detune(_detune);
set_pri(_pri);
set_pan(_pan);
sendAll();
}
void Part::set_pitchbend_factor(uint8 value) {
if (value > 12)
return;
set_pitchbend(0);
_pitchbend_factor = value;
if (_mc)
_mc->pitchBendFactor(_pitchbend_factor);
}
void Part::set_onoff(bool on) {
if (_on != on) {
_on = on;
if (!on)
off();
if (!_percussion)
_player->_se->reallocateMidiChannels(_player->getMidiDriver());
}
}
void Part::set_instrument(byte * data) {
_instrument.adlib(data);
if (clearToTransmit())
_instrument.send(_mc);
}
void Part::load_global_instrument(byte slot) {
_player->_se->copyGlobalAdlibInstrument(slot, &_instrument);
if (clearToTransmit())
_instrument.send(_mc);
}
void Part::key_on(byte note, byte velocity) {
MidiChannel *mc = _mc;
_actives[note >> 4] |= (1 <<(note & 0xF));
// DEBUG
if (_unassigned_instrument && !_percussion) {
_unassigned_instrument = false;
if (!_instrument.isValid()) {
warning("[%02d] No instrument specified", (int) _chan);
return;
}
}
if (mc && _instrument.isValid()) {
mc->noteOn(note, velocity);
} else if (_percussion) {
mc = _player->getMidiDriver()->getPercussionChannel();
if (!mc)
return;
mc->volume(_vol_eff);
mc->programChange(_bank);
mc->noteOn(note, velocity);
}
}
void Part::key_off(byte note) {
MidiChannel *mc = _mc;
_actives[note >> 4] &= ~(1 <<(note & 0xF));
if (mc) {
mc->noteOff(note);
} else if (_percussion) {
mc = _player->getMidiDriver()->getPercussionChannel();
if (mc)
mc->noteOff(note);
}
}
void Part::init() {
_player = NULL;
_next = NULL;
_prev = NULL;
_mc = NULL;
memset(_actives, 0, sizeof(_actives));
}
void Part::setup(Player *player) {
_player = player;
_percussion = (player->isGM() && _chan == 9); // true;
_on = true;
_pri_eff = player->getPriority();
_pri = 0;
_vol = 127;
_vol_eff = player->getEffectiveVolume();
_pan = clamp(player->getPan(), -64, 63);
_transpose_eff = player->getTranspose();
_transpose = 0;
_detune = 0;
_detune_eff = player->getDetune();
_pitchbend_factor = 2;
_pitchbend = 0;
_effect_level = 64;
_instrument.clear();
_unassigned_instrument = true;
_chorus = 0;
_modwheel = 0;
_bank = 0;
_pedal = false;
_mc = NULL;
}
void Part::uninit() {
if (!_player)
return;
off();
_player->removePart(this);
_player = NULL;
}
void Part::off() {
if (_mc) {
_mc->allNotesOff();
_mc->release();
_mc = NULL;
}
memset(_actives, 0, sizeof(_actives));
}
bool Part::clearToTransmit() {
if (_mc) return true;
if (_instrument.isValid()) _player->_se->reallocateMidiChannels(_player->getMidiDriver());
return false;
}
void Part::sendAll() {
if (!clearToTransmit()) return;
_mc->pitchBendFactor(_pitchbend_factor);
_mc->pitchBend(clamp(_pitchbend +
(_detune_eff * 64 / 12) +
(_transpose_eff * 8192 / 12), -8192, 8191));
_mc->volume(_vol_eff);
_mc->sustain(_pedal);
_mc->modulationWheel(_modwheel);
_mc->panPosition(_pan_eff + 0x40);
_mc->effectLevel(_effect_level);
if (_instrument.isValid())
_instrument.send(_mc);
_mc->chorusLevel(_effect_level);
_mc->priority(_pri_eff);
}
int Part::update_actives(uint16 *active) {
int i, j;
uint16 *act, mask, bits;
int count = 0;
bits = 1 << _chan;
act = _actives;
for (i = 8; i; i--) {
mask = *act++;
if (mask) {
for (j = 16; j; j--, mask >>= 1, active++) {
if (mask & 1 && !(*active & bits)) {
*active |= bits;
count++;
}
}
} else {
active += 16;
}
}
return count;
}
void Part::set_program(byte program) {
_bank = 0;
_instrument.program(program, _player->isMT32());
if (clearToTransmit())
_instrument.send(_mc);
}
void Part::set_instrument(uint b) {
_bank = (byte)(b >> 8);
_instrument.program((byte) b, _player->isMT32());
if (clearToTransmit())
_instrument.send(_mc);
}
void Part::silence() {
if (!_mc)
return;
_mc->allNotesOff();
memset(_actives, 0, sizeof(_actives));
}
////////////////////////////////////////
//
// Some more IMuseInternal stuff
//
////////////////////////////////////////
void IMuseInternal::midiTimerCallback(void *data) {
MidiDriver *driver = (MidiDriver *) data;
if (g_scumm->_imuse)
g_scumm->_imuse->on_timer(driver);
}
void IMuseInternal::reallocateMidiChannels(MidiDriver *midi) {
Part *part, *hipart;
int i;
byte hipri, lopri;
Part *lopart;
while (true) {
hipri = 0;
hipart = NULL;
for (i = 32, part = _parts; i; i--, part++) {
if (part->_player && part->_player->getMidiDriver() == midi &&
!part->_percussion && part->_on &&
!part->_mc && part->_pri_eff >= hipri)
{
hipri = part->_pri_eff;
hipart = part;
}
}
if (!hipart)
return;
if ((hipart->_mc = midi->allocateChannel()) == NULL) {
lopri = 255;
lopart = NULL;
for (i = 32, part = _parts; i; i--, part++) {
if (part->_mc && part->_mc->device() == midi && part->_pri_eff <= lopri) {
lopri = part->_pri_eff;
lopart = part;
}
}
if (lopart == NULL || lopri >= hipri)
return;
lopart->off();
if ((hipart->_mc = midi->allocateChannel()) == NULL)
return;
}
hipart->sendAll();
}
}
void IMuseInternal::setGlobalAdlibInstrument(byte slot, byte *data) {
if (slot < 32) {
_global_adlib_instruments[slot].adlib(data);
}
}
void IMuseInternal::copyGlobalAdlibInstrument(byte slot, Instrument *dest) {
if (slot >= 32)
return;
_global_adlib_instruments[slot].copy_to(dest);
}
////////////////////////////////////////////////////////////
//
// IMuse implementation
//
// IMuse actually serves as a concurency monitor front-end
// to IMuseInternal and ensures that only one thread
// accesses the object at a time. This is necessary to
// prevent scripts and the MIDI parser from yanking objects
// out from underneath each other.
//
////////////////////////////////////////////////////////////
IMuse::IMuse(OSystem *system, IMuseInternal *target) : _system(system), _target(target) { _mutex = system->create_mutex(); }
IMuse::~IMuse() { if (_mutex) _system->delete_mutex(_mutex); if (_target) delete _target; }
inline void IMuse::in() const { _system->lock_mutex(_mutex); }
inline void IMuse::out() const { _system->unlock_mutex(_mutex); }
void IMuse::on_timer(MidiDriver *midi) { in(); _target->on_timer(midi); out(); }
void IMuse::pause(bool paused) { in(); _target->pause(paused); out(); }
int IMuse::save_or_load(Serializer *ser, Scumm *scumm) { in(); int ret = _target->save_or_load(ser, scumm); out(); return ret; }
int IMuse::set_music_volume(uint vol) { in(); int ret = _target->set_music_volume(vol); out(); return ret; }
int IMuse::get_music_volume() { in(); int ret = _target->get_music_volume(); out(); return ret; }
void IMuse::setMasterVolume(int vol) { in(); _target->setMasterVolume(vol); out(); }
int IMuse::get_master_volume() { in(); int ret = _target->get_master_volume(); out(); return ret; }
void IMuse::startSound(int sound) { in(); _target->startSound(sound); out(); }
void IMuse::stopSound(int sound) { in(); _target->stopSound(sound); out(); }
void IMuse::stopAllSounds() { in(); _target->stopAllSounds(); out(); }
int IMuse::getSoundStatus(int sound) const { in(); int ret = _target->getSoundStatus(sound, true); out(); return ret; }
bool IMuse::get_sound_active(int sound) const { in(); bool ret = _target->getSoundStatus(sound, false) ? 1 : 0; out(); return ret; }
int IMuse::getMusicTimer() { in(); int ret = _target->getMusicTimer(); out(); return ret; }
int32 IMuse::doCommand (int a, int b, int c, int d, int e, int f, int g, int h) { in(); int32 ret = _target->doCommand(a,b,c,d,e,f,g,h); out(); return ret; }
int32 IMuse::doCommand (int numargs, int args[]) { in(); int32 ret = _target->doCommand (numargs, args); out(); return ret; }
int IMuse::clear_queue() { in(); int ret = _target->clear_queue(); out(); return ret; }
void IMuse::setBase(byte **base) { in(); _target->setBase(base); out(); }
uint32 IMuse::property(int prop, uint32 value) { in(); uint32 ret = _target->property(prop, value); out(); return ret; }
// The IMuse::create method provides a front-end factory
// for creating IMuseInternal without exposing that class
// to the client.
IMuse *IMuse::create(OSystem *syst, SoundMixer *mixer, MidiDriver *midi) {
IMuseInternal *engine = IMuseInternal::create(syst, mixer, midi);
return new IMuse(syst, engine);
}
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